Consistency Between Analytical and Finite Element Predictions for Safety of Cylindrical Pressure Vessels at Higher Temperatures

被引：1

作者：

Iancu, Otto Theodor ^{[1
,2
]}

Erhard, Anton ^{[3
,4
]}

Otremba, Frank ^{[5
]}

Sklorz, Christian ^{[5
]}

机构：

[1] Univ Karlsruhe, Inst Reliabil & Failure Anal Mech Engn, Karlsruhe, Germany

[2] Univ Appl Sci, Fac Mech Engn & Mechatron, Karlsruhe, Germany

[3] BAM, Berlin, Germany

[4] BAM Dept 3 Containment Syst Dangerous Goods, Berlin, Germany

[5] BAM Div Tanks Dangerous Goods & Accidental Mech, Berlin, Germany

来源：

MATERIALS TESTING | 2014年 / 56卷 / 04期

关键词：

Materials testing; FEM; plastic instability; limit load analysis; pressure vessel; analytical solution;

D O I：

10.3139/120.110556

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The prediction of the plastic collapse load of cylindrical pressure vessels is very often made by using expensive Finite Element computations. The calculation of the collapse load requires an elastic-plastic material model and the consideration of non-linear geometry effects. The plastic collapse load causes overall structural instability and cannot be determined directly from a Finite Element analysis. In the present paper the plastic collapse load for a cylindrical pressure vessel is determined by an analytical method based on a linear elastic perfectly plastic material model. When plasticity occurs the material is considered to be incompressible and the tensor of plastic strains to be parallel to the stress deviator tensor. In this case the finite stress-strain relationships of Henkel can be used for calculating the pressure for which plastic flow occurs. The analytical results are completely confirmed by Finite Element predictions.

引用

页码：274 / 278

页数：5